Protective relay



FIG. 1 is a perspective view of rear, bottom and right side of a protective relay showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a perspective view where a front cover is opened.

The portions of the article in broken lines show unclaimed subject matter only and form no part of the claimed design. 

The ornamental design for a protective relay, as shown and described. 